Tuesday, 3 January 2017

I am bit of a nitpicker when it comes to trying to get models at the exact coordinates. Before you continue I thought I had it figured out. Later I have ran into an issue that I have yet to figure out.

Goals for this blog:

Infraworks Terrain to Revit

Revit model into to Infraworks

Civil 3D model and Revit model in Navisworks

Everything in the right location without manually moving anything

Let's start of with Infraworks and I will pick this location as it's one of the few places in the Netherlands that has some elevation.

Site

Notice the elevation differences

Time to export to IMX. This will let me open it in Civil 3D.

This setting might be to big and you might want to make it smaller

Set the right coordinate system (and this turns out later to be a bad idea) Leave the coordinate system to what Infraworks has set it to)(another disclaimer this tip might change again as I still have to try and figure out which conversion is causing the errors)

export to IMX

Goto AutoCAD Civil 3D 2017

Follow the numbers in the images

Here I am not converting the model to RDnew (Dutch national coordinate grid) as I found out later the Revit model does not end up in the right location.

This is what the Civil 3D model looks like!

The tricky part now is to select a point which is going to be the point that you will know where it is in all the different applications you will have to use.

I have chosen a point and for this point I will create a couple of things:

I have a special AutoCAD block that will read the coordinates of a point and will allow me to snap to something.

For avoiding rounding errors I move this AutoCADblock to a location without decimals.

Copy the xy values to notepad! We need them later in Revit for the Project base point.

I will put another point on top of this AutoCAD block.

Notice the coordinates of this block

Turn this point into a COGO point

Select the point and notice in the bottom left of the image that nowyou also have the Latitude and Longitude of the point.

Copy to clipboard

Go to a website that can convert degrees to numbers

I use this one:convert_lat_long/ ( I have to check if this website is the one that is causing me grieve later on)

Be sure to check the letters indicated at number 4 and 2

enter the degrees and copy out the other ones

so for me:

LAT = 50.75485555555556

LON = 6.019808333333334

Don't do paste the values in this screen! (i have left this in for people who have read the previous version)

Revit 2017

Copy paste the lat/long values in like this. The comma is the separator!!!

After you hit search Revit will give you a name, ignore that it's the values in the dialogue box that is good.

New part: the step I have done wrong in the image above is that I selected the internet mapping service. I should have used the default City list.

but when you enter values in her they will get rounded

these were the values I pasted in and notice the rounding difference. I can't tell if this has a significant impact.

LAT = 50.75485555555556

LON = 6.019808333333334

Back to the AutoCAD file let's create a file that will allow the creation of the topo surface in Revit. Select your TIN surface is. (the topo) Basically I am going to extract height lines from the TIN surface.

Extract objects

uncheck the triangles

Save the file and go back to Revit

Set the units to meters

Copy xy values, the ones in Notepad, into the project base point. (NOT the LAT /LON)

Link the AutoCAD file!

Move the AutoCAD file to the correct location. (this manual moving I can't seem to fix just yet)

Create a topo surface and use the dwg file.

Uncheck all the layers except:

C-TOPO-MAJR

C-TOPO-MINR

That looks reasonable for Revit. Remember Revit's topo tools are not at the same level of excellence as the Civil 3D's tools.

Next step let's link the Revit file back in to Infraworks

I have added some walls earlier for checking to see if the surface would end up in the right location. At the moment it is close but not right... (See numbers 1,2,3 it's of by a few meter.) (4,5 and 6 point to the revit topo surface)

Reviewing the data source configuration, I noticed the lat/long coordinates have changed...

This is what we had set in Revit:

LAT = 50.75485555555556

LON = 6.019808333333334

and this is what Infraworks has read: read before:

Infraworks reads the values I have entered in the location window. Even thought the Revit interface seems to round the numbers, Infraworks reads the values I have entered.

This is was Infraworks reads now:

By now I have eliminated one error I made before and the Revit model is a bit closer to where it should be. It's not correct yet, but reasonable. I did get one other suggestion that I will try.

The problem is that I now have to figure out which mathematical conversion went wrong! None of the conversions are visible. I'll think I'll have a chat with the factory.

The other goal of getting the Revit file and the civil 3D file in the right location in Navisworks did work out. See image below.

is the Revit file,exported to nwc with shared coordinates

is the IMX file from Infraworks loaded into Civil 3D and saves as a DWG.

A couple of the goals achieved but not all. I'll try to update the blog once I have a solution or when I have found the error why the Revit file is not exactly in the right place.

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The best recipy for apple pie involves using decent apples. Any naughty or rotten apples are not recommended. Feel free to add other fruits and nuts to your apple pie. I have some good results with adding some booze as well but please don't distribute those apple pies to children. By now you should really stop reading these laimers. Ingredients

for the pastry

250g plain flour, plus extra for dusting

50g icing sugar

sea salt

1 lemon

125g cold butter, plus extra for greasing

1 large egg, preferably free-range or organic

a splash of milk

for the filling

1 large Bramley cooking apple

4 eating apples (try Cox�s or Braeburn)

3 tablespoons Demerara or muscovado sugar

teaspoon ground ginger

a handful of sultanas or raisins

a lemon

To make your pastry

Preheat the oven to 180�C/350�F/gas 4

You can make your pastry like this (by hand), or pulse it in a food processor

From a height, sieve your flour into a large mixing bowl

To make your pastry

Add the sugar, a pinch of salt, and finely grate over the zest of the lemon

Cut the butter into cubes, then add to the bowl

Use your fingertips to gently work the butter into the flour and sugar until the mixture resembles breadcrumbs

To make your pastry

Crack the egg into the bowl with a tiny drop of milk and gently mix with your hands until the dough comes together

Wrap it in clingfilm and pop in the fridge to rest while you make the filling

To make your filling

Use a speed peeler to peel all of your apples

Cut the Bramley apple into sixths and the eating apples into eighths, get rid of the cores

Add all the apple pieces to a small pan with the muscovado sugar, ginger and sultanas or raisins

To make your filling

Finely grate over the zest of half a lemon, then squeeze in a little juice

Toss to mix then put the pan on a medium low heat

Simmer gently for 5 minutes or until the apples are just tender

Remove from the heat and allow to cool completely

To make and cook your pie

Dust a clean work surface and rolling pin with flour

Divide your pastry dough into two and roll out one half until 1/2 cm thick

Carefully roll your pastry around the rolling pin, then unroll it carefully over a 20cm pie dish

To make and cook your pie

Ease the pastry into the dish, making sure you push it into all the sides

Don't worry if it tears or breaks just patch it up it will look nice and rustic

Pack the apple mix tightly into the pie dish

To make and cook your pie

Separate your remaining egg and beat the yolk with a splash of milk and brush over the pastry rim

Roll out the other piece of dough until �cm thick

Carefully roll the pastry around the rolling pin, then unroll it over the top of the pie

To make and cook your pie

Fold the excess pastry back in then pinch and crimp the edges together using your finger and thumb

Brush the top of the pie with more egg wash, then using a small sharp knife, make a couple of small incisions in the centre of the pie to let steam escape as it cooks

To make and cook your pie

Bake in the hot oven for 40 to 45 minutes until golden and firm to the touch